package com.action.gulimall.product.config;

import feign.RequestInterceptor;
import org.springframework.cloud.openfeign.FeignContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * @author sl shilun217@qq.com
 * @Deacription 设置远程请求携带cookie
 * @date 2021/07/03/17:56
 **/
@Configuration
public class MyFeignConfig {

    @Bean
    public RequestInterceptor getAddCookiesInterceptor(){
       return template -> {
           //FeignContextHolder
           //1、使用RequestContextHolder拿到刚进来的请求数据
           ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
           if (requestAttributes != null) {
               //老请求
               HttpServletRequest request = requestAttributes.getRequest();
               if (request != null) {
                   //2、同步请求头的数据（主要是cookie）
                   //把老请求的cookie值放到新请求上来，进行一个同步
                   String cookie = request.getHeader("Cookie");
                   template.header("Cookie", cookie);
               }
           }
       };
    }
}
